الفهرس 
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Abstract
The aim of this study is to investigate the effect of different parameters which are air temperature, relative humidity, air velocity, the test section surface average temperature and the test section tilting angles on heat and mass transfer during the process of condensation of water vapor from atmospheric air to help in manufacturing water generators. This thesis deals with experimental and theoretical investigations of heat and mass transfer of this process. An experimental test rig was designed and built for the experimental investigation as the test section is an Aluminum smooth flat plate heat exchanger with constant surface temperature that was cooled by using Calcium chloride solution which acts as primarily coolant that is cooled by separate refrigeration system. Forced atmospheric air is allowed to pass inside a rectangular duct where the cooled flat plate is its bottom side, from one end and the condensed water vapor is collected from the other. A variety of registered readings was made in different ambient conditions naturally or artificially occurred (using the climitization unit) with tilting angles of (00,300, 450, 600, 900) from the vertical as they were listed and plotted to investigate the effect of the previous parameters individually on the water collection procedure. Also, the numerical analysis for solving the four governing equations was proceeded by using CFD-Fluent (6.3.26) program as the flow is assumed to be steady, laminar, fully developed and the fluid properties were assumed to be constant. A fairly valid comparison is made between experimental and theoretical results of the present work and also between results of the present work with the others. from the experimental results, it had been noticed that the best heat transfer occurs at inclination angle of 45o from the vertical and the best mass transfer occurs at the vertical position.